Journal of Materials Science

, Volume 23, Issue 2, pp 588–592 | Cite as

Synthesis of barium hexaferrite for magnetic recording media using the KCl flux system

  • Kazuo Higuchi
  • Shinako Takahashi
  • Hideaki Itoh
  • Shigeharu Naka
Article
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Abstract

Individual and fine crystals of barium hexaferrite were prepared by a modified flux method using the KCI flux system. Co2+-Ti4+-substituted barium hexaferrite with a homogeneous composition was synthesized at 950° C for 5 h or at 1000° C for 1 h from a mixture of BaCO3, Fe2O3, CoO and TiO2 with 30 wt% KCI added. Laboratory-prepared fine Fe2O3, was preferred because it gave ferrite particles with diameters of 0.2 to 0.4μm. Magnetic properties were controlled by the Co-Ti content in hexaferrite crystals. Coercive force and Curie temperature decreased with the degree of Co-Ti substitution with saturation magnetization held at high value. The present process, from which individual and fine barium hexaferrite crystals can be prepared by using the KCI flux system, is recommended as a means of mass-production of ferrite powders with controlled magnetic properties for use in magnetic recording media.

Keywords

TiO2 Ferrite Fe2O3 Saturation Magnetization Coercive Force 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.
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Copyright information

© Chapman and Hall Ltd. 1988

Authors and Affiliations

  • Kazuo Higuchi
    • 1
  • Shinako Takahashi
    • 1
  • Hideaki Itoh
    • 1
  • Shigeharu Naka
    • 1
  1. 1.Synthetic Crystal Research Laboratory, Faculty of EngineeringNagoya UniversityNagoyaJapan

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